× Auto Repair Pros Member Benefits TechHelp Knowledge Base Forums Resources My iATN Marketplace Chat Pricing About Us Join Industry Sponsors Video Members Only Repair Shops Auto Pro Careers Auto Pro Reviews
Join Now
International Automotive Technicians Network

U1040 Diagnostic Trouble Code Discussion for February 2006

Lost Communication With Antilock Brake System Module

Note: This is a professional automotive technician's resource.
Vehicle Owners: If you are seeking an automotive repair professional to service your vehicle, visit the iATN Repair Shop Finder.

Trouble Ticket Help Requests for DTC U1040
Help Request Posted
2002 Pontiac Montana 3.4L MIL Lamp on VIN: 1GMDU03E42
U1040: Lost Communications With Electronic Brake Control Module. ... and data can be read, after starting, will not communicate data with aftermarket scanner (snap-on), and these codes all return. When abs module left out of circuit, all can be read but code u1040 comes back. Have checked ...
February 18, 2006